Oki OKIFAX 5950 Series Maintenance Manual page 448

R76-
A3.1.10 Toner Low Detection
• Device
The Toner Low Detection device consists of a stirring gear which rotates at a constant rate, a
stiring bar and a magnet on the stirring bar. The stirring bar rotation is driven by the link to
the gouged portion in the stirring gear.
Magnet
• Operation
Toner Low is detected by monitoring the time interval of the encounter of the magnet set on
the sensor plate and the magnet on the stirring bar.
Operation during Toner Full state
• The stirring bar rotates due to the mechani-
cal transmission of energy originating from
the interlocking with the stirring gear.
• Even when the magnet on the stirring bar
reaches the maximum height, the stirring
bar is pushed by the stirring gear, since the
other side is being dipped in the toner.
Operation during Toner Low state
• When the stirring bar reaches the maximum
height, it falls to the minimum height due to
its own weight, since there is no resistance
provided by the toner on the other side.
Because of this, the time interval during
which it is in encounter with the magnet of
the sensor plate becomes longer. By
monitoring this time interval, Toner Low
state can be detected.
OF5750/5950 Series January 2001
Stirring Bar
Stirring Gear
Stirring Bar
Toner Sensor
Stirring Bar
A3 - 20
Gouged
portion
Stirring Gear Section
Sensor Plate
Sensor Plate